Initial pro forma invoice implementation
Fallback for no sample point in invoices
Changed to handling both pro forma and published invoices
Print view for analysis request invoice
Removed old invoice css
Added invoices to navigation portlet, setup list view for invoices and cleanup on invoicefolder content definition
Added import for invoice batches
Cancelling for invoice batches
Enabled invoice folder filter
Use default contentsMethod
Merge branch 'invoicing' of github.com:bikalabs/Bika-LIMS into invoicing

Conflicts:
	bika/lims/browser/invoicefolder.py
Creation of invoice batches and listing of invoices inside them
Merge branch 'invoicing' of github.com:bikalabs/Bika-LIMS into invoicing
Print display for individual invoices fo invoice batch
Replaced invoice number with object id
Added print action for invoice
Attempt at overriding SupplyOrder base_edit
Basic editing of supply order
Added setup data for lab products
Fixed lab product setup data description import